Rio Velt watershed is located in the municipality of Sauris di Sotto, in the
Friuli Venezia Giulia Region and is made by three subwatershed that have
their confluence upstream the crossing of provincial road that take to
Sauris di Sopra. In Schneider tales during 1800, there were witnesses of
possible debris flow phenomena in the area. On this basis and on
geomorphologic evidences, an outline of the event has been realized. This
perimeter has the ID (Identification Number) 0301070200 inside the
landslide Italian inventory called I.F.F.I. (Inventario dei Fenomeni Franosi
in Italia) and has been adopted in second instance from the P.A.I. project
(Piano di Assetto Idrogeologico). The outlined region represent a wide
area in which are located different infrastructures as a camping place, a
sport center and part of the province road. The present work would like to
highlight the importance of using of objective methodologies to outline the
debris flow phenomena and this permit to obtain scenarios of event that
reconstruct the verified events or to create new scenario for area that has
not yet been involved in alluvial events in which there are not data
available for a back analysis process. So, in the studied area many
simulations have been realized that allowed to identify with more
awareness a possible event in order to modify the actual outline and to
make it acceptable for the P.A.I. Project.
